Chennai: Before the pandemic, fewer than one in five Indian teenagers were active enough to stay healthy. Then schools shut for nearly two years. A new four-city study asks the question we keep dodging: when the classroom closes, can the neighbourhood keep our kids moving? The study, published in the Journal of Transport & Health, surveyed 500 teenager-and-parent pairs across Chennai, Bengaluru, Hyderabad and Kochi. It is the first in India to test how walkable a neighbourhood feels against how much its teenagers actually move outside school. The findings are uncomfortable and overdue. The number...